Gallium circularity trace
DPPTraceable recovery of secondary gallium from foundry scrap and e-waste through purification, wafer production, and MEMS deposition.
DPPWorkflow
1
Foundry scrap collection and sorting
Organization 1
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1.1Scrap batch intake register
Register each incoming gallium-bearing scrap batch with source line, scrap class, packaging condition, and gross mass.
Required roles: supervisor Chemical analyst
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1.2Sorting and segregation log
Record how the incoming scrap was sorted into homogeneous gallium-bearing fractions and identify any rejected material.
Required role: supervisor
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1.3Outbound transfer dossier
Provide the batch summary and transfer documents for the sorted material shipped to the sampling partner.
Required role: supervisor
2
E-waste sample provision
Organization 2
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2.1Sampling plan and composite selection
Define the sampling approach used to create representative gallium-bearing test samples from the received material.
Required role: analyst
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2.2Sample characterization summary
Summarize the observed sample matrix and attach analytical evidence relevant to downstream gallium recovery.
Required role: analyst
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2.3Recovery sample dispatch
Confirm which prepared samples were sent to the recovery partner and include the associated traceability documents.
Required role: analyst
3
Secondary semiconductor recovery
CRITICAL
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3.1Recovery process route log
Capture the selected recovery route, main unit operations, and planned gallium-containing intermediate streams.
Required role: Project manager
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3.2Gallium recovery yield report
Report recovered gallium mass, yield, and main impurity observations for the produced secondary intermediate.
Required role: Project manager
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3.3Secondary gallium intermediate release
Release the recovered gallium intermediate for downstream purification together with traceability and safety documentation.
Required role: Project manager
4
Refinement and chemical processing
Dockweiler
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4.1Purification batch record
Document the purification campaign used to convert the recovered gallium intermediate into electronic-grade feedstock.
Required role: Head of R&D
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4.2Refined gallium certificate of analysis
Record purified gallium quality data and attach the corresponding certificate of analysis.
Required role: Head of shipping
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4.3Transfer to wafer production
Confirm the lot released to wafer manufacturing and include packaging and handling instructions.
Required role: T&BS operator
5
Production of GaAs secondary wafers
IFW
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5.1Crystal growth batch declaration
Declare the production batch in which secondary gallium was used for GaAs crystal growth.
Required role: Analytical chemist
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5.2Wafer metrology and defect summary
Summarize key wafer quality indicators obtained after slicing, polishing, and inspection.
Required role: Chemical process technologist
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5.3Wafer lot release for deposition
Release the qualifying secondary wafer lot to the deposition partner with the required lot-level traceability data.
Required roles: Project manager Chemical process technologist Analytical chemist
6
Secondary Ga atomic deposition in MEMS
Closing the loop
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6.1Deposition recipe setup
Record the deposition recipe, substrate lot, and precursor or source-material settings used for secondary gallium deposition.
Required role: Operator
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6.2Deposited layer verification
Provide the verification data confirming deposited layer thickness, uniformity, and functional acceptability.
Required role: Operator